From 435fef20acfc48f46476abad55b0cd3aa47b8365 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Mon, 9 Feb 2009 03:55:28 +0100 Subject: [PATCH] Bluetooth: Don't enforce authentication for L2CAP PSM 1 and 3 The recommendation for the L2CAP PSM 1 (SDP) is to not use any kind of authentication or encryption. So don't trigger authentication for incoming and outgoing SDP connections. For L2CAP PSM 3 (RFCOMM) there is no clear requirement, but with Bluetooth 2.1 the initiator is required to enable authentication and encryption first and this gets enforced. So there is no need to trigger an additional authentication step. The RFCOMM service security will make sure that a secure enough link key is present. When the encryption gets enabled after the SDP connection setup, then switch the security level from SDP to low security. Signed-off-by: Marcel Holtmann --- include/net/bluetooth/hci_core.h | 3 +++ net/bluetooth/l2cap.c | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index f75028b33883..9473fce499e7 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -597,6 +597,9 @@ static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, __u8 encr { struct list_head *p; + if (conn->sec_level == BT_SECURITY_SDP) + conn->sec_level = BT_SECURITY_LOW; + hci_proto_encrypt_cfm(conn, status, encrypt); read_lock_bh(&hci_cb_list_lock); diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 01f750142d55..88340d24d11d 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -805,7 +805,7 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_ l2cap_pi(sk)->sport = la->l2_psm; sk->sk_state = BT_BOUND; - if (btohs(la->l2_psm) == 0x0001) + if (btohs(la->l2_psm) == 0x0001 || btohs(la->l2_psm) == 0x0003) l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; } @@ -852,6 +852,9 @@ static int l2cap_do_connect(struct sock *sk) auth_type = HCI_AT_NO_BONDING_MITM; else auth_type = HCI_AT_NO_BONDING; + + if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) + l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; } else { switch (l2cap_pi(sk)->sec_level) { case BT_SECURITY_HIGH: -- 2.30.2